Pit Formation in the Cathodic Polarization of Passive Iron II. Effects of Anions

Publisher Website
Google Scholar
Abstract
The effects of anions on pit initiation have been investigated in cathodic polarization of passive iron, and it was found that halide and sulfate ions were aggressive; while perchlorate, acetate, and nitrate were nonaggressive. The aggressiveness was conspicuously dependent on pH, the concentration of anions, the potential scanning rate and the initial thickness of passive film. Pitting potential was determined by a coupling of the cathodic reduction of the passive film and the numerous anodic reactions involving complex formation of iron ion with aggressive ion. The general pitting potential equation has been derived, and the special case discussed.

This publication has 0 references indexed in Scilit: